Simply key in the final damage and the excel spreadsheet will tell you the % damage boost to lv32, 40 and 50 targets.

NOTE: there might be some small discrepancy between the value shown in the spreadsheet and the real ingame % damage boost because the equations are obtained by curve fitting. The error normally would not exceed 1%.

GROWTH OF FINAL DAMAGE

The growth of final damage is non-linear in nature.

For example, from the curve for lv40 target, it can be seen there, the % damage increase curve increases very significantly after the point of inflecton at around 500 final damage.

Before that point, the slope of the curve is actually pretty mild, meaning increase of final damage doesn't give much increase of % damage inc.

However, after the point of inflection, the slope of the curve grows exponentially. A small increase of final damage gives a HUGE increase of % damage inc, espeically near 700 final damage.

EFFECT OF TARGET LEVEL

Another interesting properties of Final Damage is that the level of the target actually affects the % damage increase too. ( see the figure above )

Final damage give more % damage boost if your target is lower level.
For example, a player with 523 FD hits a lv32 monster, deal 61.9% extra damage.
The same player with 523 FD hits a lvl40 monster, deal only 21.7% extra damage.
With a fixed FD value, the damage boost reduces against a target of higher level.
The damage boost versus target level curve are shown in the figure below:

From the figure above, it can be seen that for low FD, the damage variation against different level target is very small (refer to the FD = 75 and FD = 228 curve).

However, at high FD value, the curve is very non-linear and varies very significantly with target's level ( refer to FD = 515 , FD =693 and FD =805 curve).

From the curve, it can also be observed that the damage boost diminishes very significantly against high level targets.

In other words, you will need MUCH MORE FD value against high level targets/monsters to have singificantly damage boost.

For example:

To get 100% damage boost against Lv32 monster, you only need 575 FD.

To get 100% damage boost against Lv40 monster, you will need at least 805 FD.

To get 100% damage boost against Lv50 monster, you will need at least 1313 FD!!!

LIMIT OF FINAL DAMAGE

There is a limit to the % damage inc from FD.

For example, a player with 593 FD hits a lvl 32 monster, deal 100% extra damage.

The same player with a higher 705 FD hits a lvl32 monster, ALSO deal 100% extra damage.

Boosting FD beyond a certain value doesn't increase the extra damage because of the limit for FD is 100%.

The FD damage inc of 100% for lvl16 targets also confirms this effect. (see the figure above, the lv16 data.)

These test confirms that the limit for % dmg inc due to final damage is indeed 100%. In other words, the damage boost from FD will not go beyond 100%.

FINAL DAMAGE IN PVP

It is also proven in real game test that the effect of FD is nerfed significantly in PVP. The damage increase due to final damage in PVP is almost negligible.

PREVIOUS MISCONCEPTION ON FINAL DAMAGE

At lv40 cap, it was widely believed that the level gap between the player and the target / monster is one of the factor that affects the % extra damage.